NGL i don’t think the issue is so much the AAM-3 in their current state. Especially for a new plane with XAAM-4s also. Like, it would be bad, but it wouldn’t be horrible horrible at 12.7 with no XAAM-4, or with 13.0. Generally stuff above you at that BR is pulled up to top tier, so you don’t have to worry about that many of them.
Although, honestly, XAAM-4s might be so bad on it it could stay at 12.7 with them lmao, atleast if they were IRL accurate. A missile with fairly poor manueverability, no datalink on the plane, and its seeker by itself is probably overperforming in game (the missile relies an insane amount on DL irl to help with ECCM and such), to a point where it would fairly easily be the worst ARH in the game.
The real issue is once AAM-3s get ungimped. Cause uh, yeah there will be no balancing a phantom with Python-4 tier missiles but no ARHs, or even honestly with XAAM-4 it could be tricky.